▎ 摘　　要

NOVELTY - Preparing a copper-graphene nanocomposite involves adding copper precursor comprising 1-phenanthroline complex in graphene oxide in a mass ratio of 1:4, uniformly mixing, performing heat treatment at 600-950 degrees C under inert gas atmosphere, maintaining the treated mixture, and naturally cooling to room temperature. USE - The method is useful for preparing copper-graphene nanocomposite, which is useful as oxygen reduction catalyst (all claimed) in fuel battery and metal-air battery. ADVANTAGE - The method enables simple preparation of copper-graphene nanocomposite with high catalytic reduction activity and reduced cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the copper-graphene nanocomposite prepared by the above method.